If the fridge works on propane, then it is not the refrigerant.....both gas and electric heat the same refrigerant.
1st, pull the outside cover and make sure the fridge is plugged in. Might want to check the plug with a tester to make sure you have current there. If no current there, then check the breaker to make sure that is on.
If that does't work, let us know and we can go from there....at least someone will, as that is about the limit of my fridge knowledge.
Chap , DW Joy, and Fur Baby Sango
2006 Ford F150 Super Cab 4x4
2008 Surveyor 263